Mac OS X 10.6: Shutting down your computer
Always shut down your computer before opening the case to install additional memory or other devices inside the computer. You may also need to shut down before connecting or unplugging certain peripheral devices. If you are unsure, refer to the documentation that came with the device.
You don’t have to shut down your computer when connecting or disconnecting Universal Serial Bus (USB), FireWire, telephone, S-video, microphone, headphone, and Ethernet cables.
Important:If you have a portable computer, wait for it to shut down completely before closing the display. If you close the display while the computer is shutting down, it may not shut down properly and may start up more slowly the next time you turn it on. To put the computer to sleep, close the display without choosing Shut Down.
To shut down your computer:
Choose Apple menu > Shut Down.
You can also click Shut Down in the login window, if it’s visible.
The computer is completely shut down when there is a black screen, no active power light, and no fan or drive noise.
When you shut down your computer, Mac OS X closes all open applications and their documents, logs out active user accounts, disconnects from network and Internet services, and turns off the computer. It may take a few moments for the computer to shut down.